Allow wallet2.h to run in WebAssembly

- Add abstract_http_client.h which http_client.h extends.
- Replace simple_http_client with abstract_http_client in wallet2,
message_store, message_transporter, and node_rpc_proxy.
- Import and export wallet data in wallet2.
- Use #if defined __EMSCRIPTEN__ directives to skip incompatible code.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/wallet/message_store.h b/src/wallet/message_store.h
index 637bd29a1..d40daf186 100644
--- a/src/wallet/message_store.h
+++ b/src/wallet/message_store.h
@@ -43,6 +43,7 @@
 #include "common/i18n.h"
 #include "common/command_line.h"
 #include "wipeable_string.h"
+#include "net/abstract_http_client.h"
 #include "message_transporter.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY
@@ -202,7 +203,8 @@ namespace mms
   class message_store
   {
   public:
-    message_store();
+    message_store(std::unique_ptr<epee::net_utils::http::abstract_http_client> http_client);
+
     // Initialize and start to use the MMS, set the first signer, this wallet itself
     // Filename, if not null and not empty, is used to create the ".mms" file
     // reset it if already used, with deletion of all signers and messages